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Accepted
Muhammad Dyas Yaskur
Asked: 2019-06-28 23:38:30 +0800 CST

ec2 instance always timeout in about 60 seconds?

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Why my ec2 instance always timeout in about 60 seconds when I access http or https? After about 60 seconds always return:

Network Error (tcp_error)

A communication error occurred: "Operation timed out" The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.

For assistance, contact your network support team.

and some times return:

Gateway Timeout

The gateway did not receive a timely response from the update server or application.

I use apache web server and PHP with max timeout. I dont use ELB/Load Balancer in my EC2, and I never create any ELB. I tried to find solution in internet but always found ELB setting.

linux

2 Answers

  1. In your apache/vhost config you need to set the Timeout directive to the desired timeout value.

    https://httpd.apache.org/docs/2.4/mod/core.html#timeout

    Description: Amount of time the server will wait for certain events before failing a request
    Syntax: TimeOut seconds
    Default: TimeOut 60
    Context: server config, virtual host

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  2. Best Answer

    According this article I just need to run the command below

    /sbin/sysctl -w net.ipv4.tcp_keepalive_time=200 net.ipv4.tcp_keepalive_intvl=200 net.ipv4.tcp_keepalive_probes=5

    I tried and not working, but after I edited /etc/sysctl.conf and add following code:

    net.ipv4.tcp_keepalive_time=200
net.ipv4.tcp_keepalive_intvl=200
net.ipv4.tcp_keepalive_probes=5

    Then I rebooted my instance, and now the timeout is longer.

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